Acquisition sensitivity can be summarized in two conditions: ephemeris available from any source, or ephemeris must be obtained from the satellite data stream. For conditions where ephemeris is available, we can acquire a satellite down to about -155 dBm. When we must decode … Continue reading “How do you summarize acquisition sensitivity?”
Author: invent
How do you summarize acquisition sensitivity?
How does your GPS output the 1 PPS?
For the ISM300x and ISM420 GPS, we output the 1 PPS as follows: The first output starts when we the GPS Kalman filter gets a stellite fix. Thereafter, the 1 PPS continues to be output until the receiver is reset. If we … Continue reading “How does your GPS output the 1 PPS?”
What voltage does the ISM420 and ISM480 support?
The ISM420 and ISM480 require 1.8V to run. The I/O inputs are 3.3v tolerant, however the I/O output is only at 1.8v. If you micor does not support 1.8V you will need a translator chip.
How do you connect to the ISM480?
The ISM480 has an Ipex 12 pin connector header and you need to put the same mating connector on your board and connect via a flex ribbon cable. Inventek supplies a two length ribbon cables and the Ipex connectors on the … Continue reading “How do you connect to the ISM480?”
Can the GPS be flashed in System?
Yes, the ISM300x and the ISM480x family of GPS can be flashed in system. You need to control the flash enable pin and you can upgrade teh flash through the UART.
What information is available to indicate the degree of accuracy of the GPS data at any given time?
What information is available to indicate the degree of accuracy of the GPS data at any given time? What is the criteria used to establish HDOP, is it only related to satellite location and signal strength? We provide HDOP and … Continue reading “What information is available to indicate the degree of accuracy of the GPS data at any given time?”
What does the GPS firmware do with the acceleration / speed at high altitude build for us to 135k feet?
The high-altitude change was simply setting the upper limits on a solution from the Kalman filter. It had no effect on how we report altitude or speed or how we handle acceleration. Therefore, with such a build we still make … Continue reading “What does the GPS firmware do with the acceleration / speed at high altitude build for us to 135k feet?”
How do I choose the best GPS for my application?
The newest GPS technology we have today is the SiRF IV GPS modules and we offer two products, the ISM420 and the ISM480. The ISM420 is a ROM based solution with no antenna attached, while the ISM480 is a Flash … Continue reading “How do I choose the best GPS for my application?”
Where do you manufacture your products?
Our GPS and WiFi products are qualified in four different manufacturing sites, Massachusetts, Philippines Taiwan and China. Our antenna products are manufactured in Massachusetts and Taiwan. Depending on the product we can ship from several sites to optimize shipping costs
What are your hours of operation, mailing address and support e-mail address?
2 Republic Road, Billerica, MA 01862 Monday – Friday U.S. EST 08:00 a.m. – 05:00 p.m Sales Support: sales@inventeksys.com Technical support: Engineering@inventeksys.com